Improvement in sewing-machine shuttles



I. STAMM. Sewing-machine- Shuttle,

Patented June 8,1975.. I

THE GRASMIC CDtibTO -LITIL 39 & 4l PARK PLACEJLY.

UNITED STATES PATENT OFFICE.

JULIUS STAMM, OF COVINGTON, KENTUCKY.

IMPROVEMENT IN SEWING-MACHINE SHUTTLES.

Specification forming part of Letters Patent No. 164, [09, dated June 8,1875; application led Y March 17, 1875.

To all whom it may concern:

Be it known that I, JULrUs STAMM, of Covington, State of Kentucky, haveinvented an Improvement in Sewing-Machine Shuttles, of which thefollowing is a specification:

The object of this invention is to provide an easy means of threadingthe shuttle, and of regulating the tension of the thread by slotting theside of the shuttle from the end inward, and providing apeculiarly-formed spring and attaching the same to the side of theshuttle, in the manner vhereafter described.

In the drawing, Figure l is a perspective view of the shuttle properlythreaded and ready for use. Fig. 2 is a section cut through the centerof the spring-pins and shuttle. Fig. 3 is a plan of the shuttle withspring and latch removed.

A is the body of the shuttle, which has the slot 7c cut from the rear toabout midway of its length, as seen in Fig. 3, and in dotted lines inFig.'1, and having the side to which the spring is attached attenedabout the sizeof the spring, leaving the rounded part ofthe shuttle atthe front end of the spring to project up, so as to prevent the threadcatching under the spring as the shuttle moves forward. B is the springfor regulating the tension; it is hinged to J[he latch O, and secured tothe side ofthe shuttle by the screw pin or bolt f and the nut c, whichis secured permanently in the spring by being riveted so as to turnfreely. It is also optional Whether the pin h, around which the threadpasses,

and by which it is kept in place, be secured in the side of the shuttleor in the spring. C is the latch for keeping the spool D in place, andis furnished with a bearing for the spool to turn in. g is a groove cutin the side of the shuttle, into which the bent hookz' passes. This hookis formed on the lower front end of the spring B, and, passing into thegroove g, prevents the thread from being withdrawn; it is useful in someshuttles, but not indispensable in any, as the thread is always drawnfrom the spool when the shuttle moves forward in its race. I prefer tomake the shuttle round, as this shape allows a larger spool to be used.

The. shuttle is threaded by drawing the thread through the slot 7c andaround the front end of the spring, and the tension is regulated by thescrew fand nut c, and this may be done without removing the shuttle fromits race.

I claim- 1. In combination with a sewing-machine shuttle, having a slot,k, extending from its rear end forward for the thread to pass through,the spring B, nut c, and pins f and h, the parts being arranged tooperate substantially as and for the purpose set forth.

2. In a sewing-machine shuttle, the spring B, latch O, screw-pin f, andnut c, substantially as described.

J ULIUS STAMLNI. Witnesses:

HENRY VARWIG, GEO. WOLFER.

